Editing Transverse Mercator projection (section)

===[[Tissot's indicatrix|Tissot's Indicatrix]] in transverse projections===
[[File:Mercator P T Tissot.gif|thumb|500px|right|Continuous transformation from the normal [[Mercator projection|Mercator projection]] to the transverse version, with the central meridian along the x-axis. The [[Tissot's indicatrix|Tissot indicatrices]] show that conformality is preserved.]]

The [[Mercator projection]] is a conformal transformation, independently of whether it is normal, oblique or transverse. This property is shown with an animation passing smoothly from the normal aspect (equatorial projection) to the transverse aspect of a spherical Mercator projection. The indicatrices remain circular everywhere on the map, though of different sizes as a result of the local scale changes. 

During the transformation the central meridian is rotated from the y-axis in the polar projection to the x-axis in the transverse projection, as though the Earth were rotated inside the ''projection cylinder''. In both cases cropping is applied symmetrically on the y-axis, the cylinder axis, such that the map’s outline does not change. The equator of the Earth is highlighted as a thick green line. It extends to infinity in the transverse projection.